Study of the Structure of Nickel in Soda—Boric Oxide Glasses

The results of an investigation of the structure of Ni+ +, ions in Na2O–B2O3 glasses by optical and EPR techniques are reported. The coordination about the ion sites is found to be octahedral, and a small amount of covalency is inferred. The crystal-field splitting of the d8 levels decreases as the Na2O content of the glass increases. No direct evidence for the boric oxide anomaly was found.